For those with any doubts about just how popular Glee's become, if Lady Gaga and Madonna didn't do it for you and neither does Britney Spears' upcoming episode, how about The Beatles?

Ryan Murphy, the show's now legendary creator, thought he was being punked when he opened a package containing two mix-tapes and a handwritten letter from Sir Paul McCartney. The note read: Ryan, I hope you will consider some of these songs for Glee.

Turns out, the package really was from Paul McCartney, who's a huge fan of the show.
Fingers crossed that this time around the featured music will draw a guest appearance. Paul McCartney and Mr. Schu together's almost too much to handle — almost.